Electrically operated solenoid cutoff valve for gasoline carburetors



March 1967 B 1*. HAVERSTICK 3,319,944

ELECTRICALI JY OPERATED SOLENOID CUTOFF VALVE FOR GASOLINE CARBURETORS Filed March 26, 1965 I INVENTOR Bruce 7- Haversficlr United States Patent 3,310,044 ELECTRICALLY OPERATED SOLENOID CUTOFF VALVE FOR GASOLINE CARBURETORS Bruce T. Haverstick, Rte. 3, Box 200, Hillsboro, Oreg. 97123 Filed Mar. 26, 1965, Ser. No. 443,004 3 Claims. (Cl. 123-102) This invention relates to internal combustion engines that operate on gasoline, and more particularly, to that part of the engine known as the carburetor, and still more particularly, to an electrically operated device secured to the carburetor for the saving of fuel. have been continually decreasing the amount of fuel, in this instance gasoline, that is used to run internal combustion engines ever since this type of engine first became a practical prime mover. This decreasing of the amount of gasoline an engine uses can be and is accomplished in many ways. This is a device for saving gasoline, the device being in the form of an electrically operated solenoid cutoff valve for gasoline carburetors, controlled in part by the speed of the internal combustion engine to which it is secured, as will hereinafter be described.

Another object of this invention is to provide an electrically operated solenoid cutoff valve for gasoline carburetors that can be adapted to nearly any existing carburetor now used on internal combustion engines.

Another object of this invention is to provide an electrically operated solenoid cutofi valve for gasoline carburetors, the device being operated by a rotary type governor switch that is activated by a V belt turned by the fan belt and a microswith above the throttle lever of the carburetor.

Another object of this invention is to provide an electrically operated solenoid shutoff valve for gasoline carburetors that is faster in operation than the vacuum type of apparatus, therefore providing a device that will result in smoother engine operations.

Still another object of this invention is to provide an electrically operated solenoid cutoff valve for gasoline carburetors that can be retailed by any garage for installation by its mechanic on any internal combustion engine.

These objects and other incidental ends and advantages will be more fully appear in the progress of the disclosure and be pointed out in the appended claim.

In the drawing:

FIGURE 1 is a section view of this invention, installed on a gasoline carburetor. Only that part of the carburetor is shown that is affected by this invention, and that part being shown in cross-section.

FIGURE 2 is a horizontally disposed sectional view of this invention, taken substantially along line 2-2 of FIGURE 1, and viewed in the direction indicated by the arrows.

FIGURE 3 is an electrical wiring diagram of this invention.

Looking now at FIGURE 1 of the drawing, it will be seen that the wall 5 of the main mixture passage 6 of the carburetor 7 is provided with an idle mixture passage 8 that extends vertically from the bottom of the recess 9 to the horizontal-1y disposed internally threaded opening in which is located one end of the idle adjustment screw 11. An outlet 12 extends from the aforesaid opening to the main mixture passage 6. The valve 13 is provided with an enlarged head or iron core 14 which is slidably encased in the leak-proof brass shell 15 that has its lower end pressed into the top of the carburetor casing. The aforesaid valve 13 is encircled by a light coiled spring 16 that keeps it, the valve, in an open or raised postion until it is activated by the solenoid 17 which encompasses the aforesaid brass shell 15. A micro-switch 18 is mounted Men "ice

above and in contact with, the throttle lever 19 of the aforesaid carburetor 7. The wire 20 connects the aforesaid micro-switch to the solenoid 17 which has the other end of the wire grounded at 21. The rotating governor switch 22 is connected to the aforesaid micro-switch 18 by means of the electric wire 23 while the wire 24 connects the aforesaid rotating governor switch 22 with a fuse and either the ignition or an accessory switch 26.

The aforesaid governor switch 22 is rotated by the V belt 25 which encompasses either a pulley mounted on the fan mechanism or one mounted on the rear of the electric generator of the internal combustion engine.

The operation of this invention of mine is as follows: When the solenoid 17 is energized, the valve 13 will be forced down into the idle mixture passage 8 thus cutting off the flow of gasoline that enters the aforesaid recess 9 through the horizontally disposed opening 27 that is in the wall 5 of the carburetor 7. This happens only when the engine is running above the idle speed, and the throttle is in its closed position. When one is shifting gears, if it is a gear shift vehicle, slowing down, or going down grade, the flow of gasoline to the carburetor will be completely shut off. Whenever the engine runs over six hundred revolutions per minute, the rotating governor switch 22 will close. The micro-switch 18- closes when the throttle is closed. Whenever the engine runs over six hundred r.p.m. and the throttle is closed, solenoid 17 is energized to close valve 13 and conserve gas. As soon as solenoid 17 is deenergized, spring 16 returns valve 13 to open position. It may be noted at this time that a vacuum operated carburetor valve will not do this by reason of the fact that the vacuum does not drop sufficiently for the necessary quick return operation of the valve within the carburetor. The electric wiring diagram, FIGURE 3, of the drawing clear-1y illustrates the wiring of this invention. Neither the fuse, accessory switch, or battery, are given a reference number in this aforesaid FIGURE 3, since no claim is made for these standard associated parts of the invention.

It will be understood that this invention has been described in connection with an illustrative embodiment and that many modifications, adaptions and changes in the structure shown may be made as will be apparent to those skilled in the art, without departing from the spirit of the invention.

What I now claim as new and desire to secure by grant of Letters Patent is:

1. An electrically operated solenoid cutoff valve for gasoline carburetors comprising a gasoline carburetor; a valve in the fuel intake of the said carburetor, and the sail valve having an enlarged head that is slidably incased in a leak-proof brass shell having its lower end pressed into the top of the said carburetor casing; an electric solenoid encompassing the said brass shell in a position that will cause the said electric solenoid to control the movement of the said valve; and mechanism adapted to activate the said electric solenoid as the speed of the internal combustion engine varies; and the said carburetor being connected to the said internal combustion engine.

2. An electrically operated solenoid cutoff valve for gasoline carburetors comprising a gasoline carburetor; a valve in the fuel intake of the said carburetor, and the said valve having an enlarged head that is slidably incased in a leakproof brass shell having its lower end pressed into the top of the said carburetor casing; an electric solenoid encompassing the said brass shell in a position that will cause the said electric solenoid to control the movement of the said valve; and mechanism in the form of a micro-switch mounted above the throttle, and in contact with the throttle of the said carburetor, and a rotating governor-switch connected to the said micro-switch which is connected to the said electric solenoid that will activate the said electric solenoid as the speed of the internal combustion engine varies; and the said carburetor being connected to the said internal combustion engine.

3. An electrically operated solenoid cutoff valve for gasoline carburetors comprising a gasoline carburetor; a valve in the fuel intake of the said carburetor, and the said valve having an enlarged head that is slidably incased in a leak-proof brass shell having its lower end pressed into the top of the said carburetor casing; an electric solenoid encompassing the said brass shell in a position that will cause the said electric solenoid to control the movement of the said valve; and mechanism in the form of a micro-switch mounted above the throttle, and in contact With the throttle of the said carburetor,

and a rotating governor-switch connected to the said micro-switch which is connected to the said electric solenoid that will activate the said electric solenoid as the speed of the internal combustion engine, to which the said carburetor is connected, varies since the said rotating governor-switch is rotated by a V-belt that operates off either the fan mechanism or the rear of the electric generator of the said internal combustion engine.

References Cited by the Examiner UNITED STATES PATENTS 5/1966 Walker MARK NEWMAN, Primary Examiner.

RALPH D. BLAKESLEE, Examiner. 

1. AN ELECTRICALLY OPERATED SOLENOID CUTOFF VALVE FOR GASOLINE CARBURETORS COMPRISING A GASOLINE CARBURETOR; A VALVE IN THE FUEL INTAKE OF THE SAID CARBURETOR, AND THE SAIL VALVE HAVING AN ENLARGED HEAD THAT IS SLIDABLY INCASED IN A LEAK-PROOF BRASS SHELL HAVING ITS LOWER END PRESSED INTO THE TOP OF THE SAID CARBURETOR CASING; AN ELECTRIC SOLENOID ENCOMPASSING THE SAID BRASS SHELL IN A POSITION THAT WILL CAUSE THE SAID ELECTRIC SOLENOID TO CONTROL THE MOVEMENT OF THE SAID VALVE; AND MECHANISM ADAPTED TO ACTIVATE THE SAID ELECTRIC SOLENOID AS THE SPEED OF THE INTERNAL COMBUSTION ENGINE VARIES; AND THE SAID CARBURETOR BEING CONNECTED TO THE SAID INTERNAL COMBUSTION ENGINE. 